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CHAPTER 2 BASIC OPERATION
2.
Controlling the Jogging Motor
Figure 2-419 is a diagram of the front jogging motor (M3) and the rear jogging motor (M4).
Both motors are 4-phase stepping motors.
Q1 (CPU) and Q2 (communication IC) generate the following signals (Table 2-405) for control
of the motors.
Controls direction and
speed of motor rotation
Enables motor drive
Switches drive current
Q1 controls the timing of JOGPINA and JOGPINB to suit the direction (clockwise/
counterclockwise) and speed of the motor.
Q1 generates either FJOGPER or BJOGPER depending on which motor to drive. When
FJOGPER is generated, Q17 sends JOGPINA and JOGPINB to Q19 (motor driver IC) in response
to FJOGPER.
Q19 generates 4-phase motor drive signals (FJOGA, FJOGB, FJOG_A, FJOB_B) in response
to JOGPINA and JOGPINB. Likewise, Q17 sends JOGPINA and JOGPINB to Q21 (motor driver
IC) in response to BJOGPER.
Q21 generates 4-phase motor drive signals (BJOGA, BJOGB, BJOG_A, BJOB_B) in response
to JOGPINA and JOGPINB.
FJOGPER and BJOGPER are motor drive enable signal, and the motor in question is driven in
response.
To keep the motor at rest, Q19 and Q21 continue to generate the phase signals they sent,
thereby putting the motor on hold.
FJOGCUR and BJOGUR from Q2 are current switching signals (Table 2-406) sent to the
motors.
Driving the motor
Keeping the motor on hold
2-28
Function
JOGPINA
JOGPINB
FJOGPER
BJOGPER
FJOGCUR
BJOGCUR
Table 2-405
State
Table 2-406
COPYRIGHT © 1999 CANON INC.
Notation
Motor
Front jogging motor
Rear jogging motor
Front jogging motor
Rear jogging motor
Front jogging motor
Rear jogging motor
Control current
High-level current (high torque)
Low-level current (low torque)
CANON FINISHER-E1 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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